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Old 13th May 2015
J65nko J65nko is offline
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Default Extremely serious virtual machine bug threatens cloud providers everywhere

From http://arstechnica.com/security/2015...rs-everywhere/

There's an extremely critical bug in the Xen, KVM, and native QEMU virtual machine platforms and appliances that makes it possible for attackers to break out of protected guest environments and take full control of the operating system hosting them, security researchers warned Wednesday.

The vulnerability is serious because it pierces a key protection that many cloud service providers use to segregate one customer's data from another's. If attackers with access to one virtualized environment can escape to the underlying operating system, they could potentially access all other virtual environments.
You don't need to be a genius to debug a pf.conf firewall ruleset, you just need the guts to run tcpdump
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Old 13th May 2015
Oko Oko is offline
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Originally Posted by J65nko View Post
I don't get how is this a news? With exception of Xen which makes some effort to be security conscience other two projects are insecure by default. Qemu is userland virtualization technology which is good for playing with software but nobody in right mind should use that. KVM which by the way I use in my Lab has nothing to do with security. It is just a convenient way to make people feel like they have their own machine even though in reality they don't have it.
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Old 14th May 2015
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jggimi jggimi is offline
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Originally Posted by Oko View Post
I don't get how is this a news?
It's news because it is suddenly very clear and unambiguous that a virtual machine can assume control of its host, and all that this entails. It's news because of our global civilization's reliance upon cloud computing.

VMs became ubiquitous during the 1990s for scaling server infrastructure, and in the 2000s VM dynamic management facilities enabled cloud computing services. Which all of us rely upon, whether we are aware of it or not. Do you use a bank? Do you shop at a store? Post a letter? Even people who don't have or use computers are dependent on cloud computing. All of us use services available in our societies, and those services may depend upon cloud computing, or rely upon service providers who depend upon such services.

VMs have been part of computing since 1972, and operational factors have been a consideration ever since. But focus and attention have mainly been on resource management, performance, and operational stability, not on security.

Last edited by jggimi; 14th May 2015 at 12:25 PM. Reason: typo, clarity
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